Pretty sure it's something simple that I'm missing again... 

The Register shortcode doesn't create a "Register" menu item to appear in the WPForo Menu bar. I've double-checked, and the "Anyone Can Register" option (in the Wordpress dashboard>Settings> General) is checked. In the Forums menu, I have the "Enable User Registration" active (Forums>Settings>Features).

Here's the shortcode I'm using:
/%wpforo-register%/

I've also tried condensing my menu to make sure there's plenty of room. Other changes I make, changing the hierarchy, labels, etc., all work. It's just the register option that won't show up.

(I've also tried to find this question in this forum before just asking.)

Totally stumped right now...